128028 has 24 divisors (see below), whose sum is σ = 306432. Its totient is φ = 41584.

The previous prime is 128021. The next prime is 128033. The reversal of 128028 is 820821.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 127995 and 128013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128021) by changing a digit.

128028 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451 + ... + 677.

It is an arithmetic number, because the mean of its divisors is an integer number (12768).

2¹²⁸⁰²⁸ is an apocalyptic number.

It is an amenable number.

128028 is an abundant number, since it is smaller than the sum of its proper divisors (178404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128028 is a wasteful number, since it uses less digits than its factorization.

128028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 128028 is about 357.8100054498. The cubic root of 128028 is about 50.4005164976.

Adding to 128028 its reverse (820821), we get a palindrome (948849).

The spelling of 128028 in words is "one hundred twenty-eight thousand, twenty-eight".